Pressure-regulator bellows.



No. 845,841. PATENTED MAR. 5, 1907.

v P. WUEST, JR. PRESSURE R EGULATOR BELLOWS.

APPLICATION FILED NOV. 7. 1904.

IN VENTOR:

WITN ssss';

V (7 [6 WM regardless of the variations in the pneu- Specification of Letters latent.

rEf-ES GNOR TO THE 1 Fiilri, PENNSYL- Patented March 5, 19b'7'.

Application filed ll cvcinber '7, 190 Serial l lo. 231,706.

T0 mi], whim H if? many COY'I/(HHVI/J I Be it known that I, PHILIP VJUEs'r, J11, ct hiladelphia, in the State of Pennsylvania, wave invented certain new and useful improvements in Pressure-Regulating Bellows, whereof the following is a specificatioi erence being had to the accompanyingngs.

My invention may be employed with par- 1 ticular advantage in a mechanical musical l instrument-for instance, in an instrument 5 comprising automatic playing mechanism for l sounding devices, such as piano-strings= wherein the operation is effected or (3011-, trolled by atmospheric pressure opposed to a partial vacuum within a valve-chamber. in such an embodiment my improved bellows may be located between the exhaust-pumping mechanism and the valve-chamber to maintain a substantially uniform pneumatic tension within it and said valve-chamber inatic tension within the exhauster, due to changes in the rate of operation of the e:;- l haust-pumping mechanism.

My invention comprises the various novel features of construction and arrangement hereinafter more definitely specified.

The accompanying drawing is a ver ical sectional view of a bellows conveniently embodying my improvements.

In said drawing, 1 and 2 are the opposed 1 leaves of the bellows, the former b eing conveni iently stationary with respect to the instr ment casing or framework, and the latter being movable toward and away from the leal 1 upon the hinge-joint 3 at the bottom thereof. Said leaf 1 is provided with the exhaust-port 5, leading through the nozzle 6 to the hauster and is also provided with the port 8, leading through the nozzle 9 to the chamber in which regulated pneumatic tension is to be maintained. Said leaves 1 and are connected by the collapsible diaphragm 11, which incloses the bellows-chamber 12 and folds intermediate of its width, so to present its region 13 in opposition to said port 5, as indicated in dotted lines in the draw and thereby varies the effective area of em. exhaust-port 5 in accordance with the po i tion of said leaves.

The spring 14: is conveniently disposed exii .1 I 5 the edge tneieoi. Any renew.

I J: r or the degree lows, com pr terioi: to the diapl m 11, and has its opposit e ones respot :l with the blocks 15 and 16, which are attached to the respective h 1 an" anl projectbeyond y to increase of vacuum within said bellowschamber 12 compensated by corresponding movement of the leaves 1. and 2 toward each other under pressure of the outer atmosphere and the pressure or said spring 1 1, thus c using a corresponding decrease in the ell'ec ivc area the port 5, so as to decrease the e): 'usting eil'ect attainable through sail port 5 and restore the atmosj phcre wit 1111 the bellows-chamber 12 to the PIQLiGtCllDillQli required tension. It is to be un erstoo: that the i'iegree ol pneumatic tension within said bellows-chainher 12 and the valve-chainher connected therewith may be varied in soccer co with the adjustment ol the ei'lective pl'CSStllG of said spring 1d.

7 t myself to the pari do not desire to h" ticular embodiment of my invention above specified or to the p rticular construction and a ingement her i set forth, as various lIlOQLLC'ZlJl/l may be made therein without de mi iiig irom the essential features of my invention.

l; claim ti p1 ssure re 'ulatin 'beh 1. acumis movable I vided with a port, phragm connecting and a collapsible diaaid leaves, said diaphragm be g 1100 to close over said port and thereby v y the ell'ective area of said port.

2. A pneumatic pressure regulating bellows, compris' 3; opposed leaves one of which is movable relatively to the other, and pro 3 vi ed with a port in one oi said leaves; a col lapsibie diaphragm coiirecting said leaves, said diaphragm being ar anged to vary the ell'ective area of said port in accordance with the position of said leaves and, a spring tending to separate said leaves, substantially as set forth.

3. A p eumatic-pressureregulating bellows, comprising opposed leaves, one of which is movable reia .ively to the other, provided with a port leading to an exhauster and a port leading to pneumatic valve-chamber; and, a collapsible diaphragm connecting said is movable relatively to the other, and pro- 1 vided with a port; and a eothtpsihle diaphragm eonlieetiiig said leaves itLltl forming ore Wall of the hollows iiielosure, said diaphragm heiiig tree to close over port :il thereby vary the ellective area of said port aeeorda1:.ee with the posi ion. oi said iea'ves, substantially as set forth.

A pneumatic )i'essure -1egulati11g hellows, comprising a stationary and a movable l leat and provided with a port; and a eollapsi- 1 )le diaphragm, said port being in such relatieli to the dizwhragui that the motion 01' the idOllt to its collapse causes a portion of the diaphragm to obstruct the port and vary its ell'eetive area.

testimony whereof I have hereunto e(l. my ame, at Philadelphia, Pennsyh this 4th (lay ol November, 1.904;.

PlllLlP W U EST, JR.

It ishereby certified that the name of the assignee in Letters Patent N 0. 845,841, granted March 5, 1907, upon the application of Philip Wuest, J12, of Philadelphia,

Pennsylvania, for an improvement in Pressure-Regulator Bellows, was erroneously Written and printed The Auto-Manuel Piano Action Company, whereas said name should have been written and printed The Auto-Manual Piano Action Company; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of March, A. 1)., 1907.

[SEAL] F. I. ALLEN,

Commissioner of Patents. 

